New pump fitted, yet problem of cool lower radiators persists. Heat gets down eventually if more rads are turned on upstairs. What is the cause of this?
THIS WILL BE YOUR PROBLEM JUST ADJUST THE LSV'S(LOCK SHIELD VALVES) ON THE BOTTOM OF YOUR RADS UNTIL YOU JUST START TO GET HEAT COMING THROUGH AND MOVE ON TO NEXT RAD ETC ETC
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